How severe is CVE-2020-13109?

CVE-2020-13109 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-13109 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-13109?

CVE-2020-13109 affects Seta Morita Shogi 64. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-13109?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-13109 published?

CVE-2020-13109 was published on 2020-05-16 and last updated on 2026-06-17.

CVE-2020-13109

CVE-2020-13109 is a critical-severity vulnerability in Seta Morita Shogi 64 with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 5% (91st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Seta Morita Shogi 64
Published: 2020-05-16
Last modified: 2026-06-17

Description

Morita Shogi 64 through 2020-05-02 for Nintendo 64 devices allows remote attackers to execute arbitrary code via crafted packet data to the built-in modem because 0x800b3e94 (aka the IF subcommand to top-level command 7) has a stack-based buffer overflow.

Frequently asked questions

What is CVE-2020-13109?: Morita Shogi 64 through 2020-05-02 for Nintendo 64 devices allows remote attackers to execute arbitrary code via crafted packet data to the built-in modem because 0x800b3e94 (aka the IF subcommand to top-level command 7) has a stack-based buffer overflow.
How severe is CVE-2020-13109?: CVE-2020-13109 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-13109 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-13109?: CVE-2020-13109 affects Seta Morita Shogi 64. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-13109?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-13109 published?: CVE-2020-13109 was published on 2020-05-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:seta:morita_shogi_64:*:*:*:*:*:*:*:*

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